Bug#1074014: Bug#1073608: Bug#1074014: Bug#1073622: Bug#1073608: mksh, pax: no move to /usr going to happen, because:

[Sam Hartman <hartmans@debian.org>]

>>>>> "Helmut" == Helmut Grohne <helmut@subdivi.de> writes:

    Helmut> In bullseye and earlier, I guess it works.

    Helmut> If you start with bullseye or earlier, upgrade to bookworm
    Helmut> and then to trixie, it continues to work, because the dash
    Helmut> maintainer scripts preserve any diversion that is not owned
    Helmut> by dash.

This seems really broken.
As a sysadmin I would definitely expect to be able to repoint the
/bin/sh symlink and have that preserved.
I hope we choose to move back to a situation at some point where it does
not require diversions to get that behavior.
In my mind that is an even higher priority than say avoiding bootstrap
tools needing to create a /bin/sh symlink.